That's a great question! There's no single force that specifically "pushes objects in motion away." Instead, it depends on the specific situation. Here are some forces that could be at play:

* Friction: This is the force that opposes motion between surfaces in contact. It can slow down or stop a moving object.

* Air resistance: This is a type of friction that acts on objects moving through the air. It can slow down a moving object.

* Gravity: This force pulls objects towards each other. While not directly pushing objects away, it can cause objects to fall back down to the earth after being thrown upwards.

* Magnetic fields: Magnetic forces can repel certain objects, pushing them away from a magnet.

To give you a more specific answer, I need more information:

* What kind of object is in motion? A ball, a car, a rocket?

* What is the object moving through? Air, water, space?

* What is the object moving towards? Is it approaching another object, or just moving in a straight line?

Once I know these details, I can tell you which force is most likely causing the object to be pushed away.